Process of disintegrating fibrous material used in the manufacture of paper-pulp.



W. H. STOBIE.

PROCESS OF DISINTEGRATING FIBROUS MATERIAL USED IN THE MAN UFAGTURE OP PAPER PULP.

APPLICATION FILED APR.26, 1912 LQQQfi'T/fi, Patented June 9,1914.

7 45% a K a L;

f the fibrous material with water and project- ED STATES PATENT OFFICE.

WILLIAM H. STOBIE, 0F WATERVILLE, MAINE, ASSIGNOR T0 HOLLINGSWORT'H & WHITNEY COMPANY, 015 BOSTON, MASSACHUSETTS.

PROCESS OF DISIN'TEGRATING FIBROUS MATERIAL USED IN THE MANUFACTURE OF PAPER-PULP.

Specification of Letters Patent.

Patented June 9, 1914.

Application filed hpril 26, 1912. Serial No. 693,478.

To all whom it may concern:

Be it known that 1, WILLIAM H. sapnrn, a citizen of the United States, residing at ,lVaterville, in the county of Kennebec and State of Maine, have invented certain new and useful Improvements in Processes of Disintegrating Fibrous Material Used in the Manufacture of Paper-Pulp; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to an improvement in the process of disintegrating fibrous material used in the manufacture of paper pulp, the object being to divide or separate the fibers without breaking or cutting them, thereby producing a stock that will felt better than the stock from an ordinary beating engine, and my invention consists in mixing ing it in the form of a jet, against a 1 roughened or serrated surface.

My invention further consists in drawing the stock from a vat, by means of a pump and projecting it in the form of a jet against a roughened surface located within the vat, and continuing the operation until the fibers have been thoroughly separated from each other.

The'accompanying drawing is a diagrammatic view of one form of apparatus for carrying out my process.

1 represents a vat or tank to contain the paper stock which has been previously mixed with the proper proportion of water to reduce it to a consistency where it can be readily pumped and conveyed through pipes and 2 is a plate or target within the tank and provided with a serrated surface. This plate is preferably made of metal, but it may be of sand stone or other material and may be an integral structure or made up of sections, and it may also be fixed, or adjustable so as to change its position relative to the discharge nozzle 4:.

Leading from the bottom of tank 1 to the pump 5 the pipe 6, and leading from the pump 5 back to the tank 1, is the discharge pipe 7, terminating within the tank in the nozzle 4t, the discharge end of which may be circular or oblong. The nozzle is so located with relation to the serrated plate 2 that the stock will be projected against the serrations at an angle or with a glancing blow, and is kept circulating through the tank, pump and pipes against the serrated plate, until the stock has been reduced to the required consistency. This contact of the stock with the roughened face of the plate reduces the material to fibrous form without impairing the strength, or reducing in length, the fibers of the original pulp.

The target 2 is unconfined, that is to say, it is not provided with marginal flanges or walls and is so located with relation to the walls of its inclosurethat the liquid pulp after its contact with the target, will be unrestrained and free to fly out of the path of the incoming stream, and the target is of such .size in proportion to the stream, that ample room is provided for the spreading of the stream or jet after it strikes the target.

Again instead of circulating or 'repassing the stock through the vat and pump until it has been reduced to the desired condition, I may simply as one step in the process, project the stock against the serrated plate, and then pass it to a reducing engine or other apparatus employed in the paper 'making process. The action of the serrated face, on the stock, is to divide or separate the fibers without breaking or cuttin them and experiments have demonstrated that stock can be prepared, by this process, for the paper machines without any treatment whatsoever in the old style ofbeaters.

Having fully described my invention what I claim as new and desire to secure by Letters Patent, is

The herein described process of disintegrating fibrous material used in the manufacture of paper, which consists in forcibly projecting an unconfined stream jof the liquid pulp stock against a roughened, surface, whereby the fibrous material carried in the liquid will be disintegrated.

lln testimony whereof, I have signed this specification in the presence of two subscribing witnesses.

WILLIAM H. STOBIE. Witnesses:

Pnnor M. CRAM,

Josnrnr R. GoonwIN. 

